The nurse is teaching a client who is starting oral doxycycline. Which statement shows correct understanding?
1I will take each dose with an antacid and iron tablet so the medicine is absorbed better.
2I will take it with plenty of water, separate it from antacids or iron, and limit sun exposure.✓ Correct answer
3I will stop taking it as soon as my fever resolves even if doses remain in the prescription.
4I will take it immediately before lying down because that prevents stomach and esophageal irritation.
Explanation
Adequate fluid helps reduce esophageal irritation with doxycycline. Antacids containing aluminum, calcium, or magnesium and iron preparations impair absorption, and photosensitivity can occur, so sun exposure should be limited. The client should complete therapy as prescribed and avoid taking the dose immediately before lying down.
Clinical reasoning Doxycycline absorption decreases when it binds polyvalent cations in antacids or iron products. It can also irritate the esophagus and cause an exaggerated sunburn reaction.
Decision rule Take the tablet with adequate water, remain upright after the dose, separate interacting mineral products, protect against sun exposure, and finish the prescribed course unless the prescriber changes it.